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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Discussion papers
https://doi.org/10.5194/angeo-2019-19
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/angeo-2019-19
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Regular paper 14 Feb 2019

Regular paper | 14 Feb 2019

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Annales Geophysicae (ANGEO).

Response of low to mid latitude ionosphere to the Geomagnetic storm of September 2017

Nadia Imtiaz1, Waqar Younas2, and Majid Khan2 Nadia Imtiaz et al.
  • 1Theoretical Physics Division, PINSTECH, Nilore, Islamabad, Pakistan
  • 2Quaid-i-Azam University, Islamabad, Pakistan

Abstract. We study the impact of geomagnetic storm of September 6–9, 2017 on the low-to-mid latitude ionosphere. The prominent feature of this solar event is the sequential occurrence of the two Dst minima of maximum negative values −148 nT and −122 nT on September 8 at 2 UT and 15 UT, respectively. The study is based on analyzing the data from GPS stations and the magnetometer observatories located at different longitudinal sectors such as Asia, Africa and America. The GPS data is used to derive the global, regional and vertical total electron content (TEC) in the selected regions. The data of the magnetic observatories is used to illustrate the variation in the magnetic field particularly, the horizontal component of the magnetic field. It is observed that the storm time response of the TEC over the pre-noon sector (Asia) is earlier than Africa and America. The global thermospheric composition maps by Global Ultraviolet Imager exhibits a storm time variation in the O/N2 ratio. The positive storm effects in the vertical TEC and in the O/N2 ratio occur in the low latitudes/ equatorial regions.

Nadia Imtiaz et al.
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Nadia Imtiaz et al.
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Short summary
We study the impact of geomagnetic storm of September 6–9, 2017 on the low-to-mid latitude ionosphere. The study is based on analyzing the data from GPS stations and the magnetometer observatories located Asia, Africa and America. The GPS data is used to derive the global, regional and vertical total electron content (TEC) in the selected regions. The storm time response of the TEC over the Asia is earlier than Africa and America. The positive storm effects in the vTEC occur in low latitudes.
We study the impact of geomagnetic storm of September 6–9, 2017 on the low-to-mid latitude...
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